What is a double action pump for an inflatable stand up paddle iSUP board ? Posted on December 9, 2016December 8, 2019 by Waterman Congratulations on buying your inflatable stand up paddle board. Your (hopefully) charming salesperson offered you a board with a so called double action pump. Say what? Double action pump? What does it mean? what-is-a-double-action-sup-pump Post navigationPrevious post: History and origin of Stand up Paddle SUP surfingNext post: Training for the Swiss ICE SUP Race and doing a little R&D…